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arXiv · 1912.09943

Chiral topological photonics with an embedded quantum emitter

Mahmoud Jalali Mehrabad·Andrew P. Foster·René Dost·A. Mark Fox·Maurice S. Skolnick·Luke R. Wilson
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Abstract

Topological photonic interfaces support topologically non-trivial optical modes with helical character. When combined with an embedded quantum emitter that has a circularly polarised transition dipole moment, a chiral quantum optical interface is formed due to spin-momentum locking. Here, we experimentally realise such an interface by integrating semiconductor quantum dots into a valley-Hall topological photonic crystal waveguide. We harness the robust waveguide transport to create a ring resonator which supports helical modes. Chiral coupling of quantum dot transitions, with directional contrast as high as $75\%$, is demonstrated. The interface also supports a topologically trivial mode, comparison with which allows us to clearly demonstrate the protection afforded by topology to the non-trivial mode.

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Mahmoud Jalali Mehrabad, Andrew P. Foster, René Dost, A. Mark Fox, Maurice S. Skolnick, Luke R. Wilson. 2020-10-28. Chiral topological photonics with an embedded quantum emitter. https://doi.org/10.1364/optica.393035

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